10 Best Bike U Locks

#1 Best Pick

Via Velo Bike U-Lock with Cable, Heavy Duty Anti-Theft Bicycle U Locks with 8mm Braided Steel and 3 Keys, 4ft Length Security Cable for Bike, Scooter Mountain Road Bike

Brand: Via Velo

Security & Durability - Via Velo bike U-lock offers robust protection with a 9 mm hardened steel shackle, resisting cutting, prying, and leverage attacks. The set comes with 3 ergonomic keys made of durable stainless steel, ensuring reliability
Weather-Resistant & Scratch-Proof: The bike cable is equipped with a scratch-proof, wear-resistant, and water-resistant nylon sleeve cover. This protective cover ensures longevity and prevents scratches on your valuable possessions
Convenient and Portable: The U-lock is heavy enough for reliable security yet light enough for easy portability. Its compact size
Versatile Application - Ideal for securing bicycles, sports equipment, gates, fences, toolboxes, and more. The included 4ft steel cable adds flexibility for various locking scenarios, providing comprehensive protection for your belongings
LIFETIME LIMITED WARRANTY AND CUSTOMER SERVICE: Via Velo is committed to providing our customers with high quality products . If you are having any problems with Via Velo product, please reach out to our Customer Service Team. Our Team will solve your issue as soon as possible. We give our locks with a limited lifetime warranty so you can buy your lock with confidence

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#2 Best Value

Kryptonite New York Standard Bike U-Lock, Heavy Duty Anti-Theft, 16mm Shackle with Mounting Bracket and Keys, Ultimate Security for Bicycles E-Bikes Scooters

Brand: KRYPTONITE

16mm Hardended Max Performance Steel Shackle Resists Hand Tools, Bolt Cutters, and Leverage Attacks.Note: Measure your door's backset, cross bore and thickness to ensure you find the right fit.Control Method:Application
Interior Locking Dimensions; 4" x 8"
Key Safe Program; Kryptonite will ship your first 2 keys for free, globally, in the event you lose them.
Anti-Theft Protection Offer; Up to $4,000 Reimbursement for 1 Year Included
Secure Mounting Bracket; Includes versatile Flexframe-U Bracket, allowing you to carry your bike lock during transportation

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#3 Budget Pick

Sportneer Bike Lock Set Heavy Duty Keyless U Lock with 5 Ft Security Steel Cable for Road Bike Mountain Bike

Brand: Sportneer

Keyless & Convenient: Say goodbye to the hassle of forgetting, losing, or breaking keys! The compact and easy-to-carry Sportneer U-lock boasts a unique keyless design, ensuring both convenience and practicality. Plus, the adjustable mounting bracket fits round tubes up to 2.48in/63mm in diameter, making it a breeze to install on your bike frame while you ride.
High Security & Anti-theft: The Sportneer combination U-lock features a 4-digit resettable lock, offering 10,000 possible combinations to ensure robust security. You can easily set or reset the lock to your preferred code, making it harder to crack. Additionally, it includes a 5-foot/1.5m long, 0.47in/12mm thick double-loop steel cable with PVC coating, providing versatile options for securing your bike, significantly boosting overall security.
Sturdy & Durable: The Sportneer U-lock is built tough with a 0.56in/14mm thick hardened zinc alloy cylinder, covered by 0.08in/2mm of silicone to resist cutting and sawing. This protective layer also guards against scratches and cylinder wear. Better yet, it features anti-tampering properties, enhancing its anti-theft performance. Additionally, the steel cable, with its 0.16in/4mm thick PVC rubber coating, is waterproof, dustproof, and corrosion-resistant, ensuring long-lasting durability.
Wide Applications: The combination of the U-lock and steel cable is perfect for securing bicycles, strollers, kick scooters, electric bikes, skateboards, lawnmowers, generators, sports equipment, and more. It can be used on bike frames, fences, gates, and utility poles, offering versatile security for various items and situations.
Helpful Tips: The Sportneer U-lock set includes a bike U-lock, a 5-foot/1.5m bike steel cable, a bike bracket, and a double-headed screwdriver. Before purchasing, be sure to measure your bike to ensure the U-lock will fit properly. Keep in mind that no lock is completely foolproof, so avoid leaving your bike in high-crime areas or unattended outdoors for long periods.

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#4 Top Choice

Kryptonite New York Fahgettaboutit Mini Bike U-Lock, Heavy Duty Anti-Theft Bicycle U Lock, 18mm Shackle with Keys, Ultimate Security Lock for Bicycles E-Bikes Scooters

Brand: KRYPTONITE

18mm Hardended Max Performance Steel Shackle Resists Hand Tools, Bolt Cutters, and Leverage Attacks
Interior Locking Dimensions; 3.25" x 6"
Key Safe Program; Kryptonite will ship your first 2 keys for free, globally, in the event you lose them.
Anti-Theft Protection Offer; Up to $5,000 Reimbursement for 1 Year Included

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#5 Popular Choice

Bicycle Chain Lock, Sportneer High Security 5-Digit Resettable Combination Anti-Theft Bike Locks, Portable Outdoors Road Bike Chain Lock for Mountain Bicycles

Brand: Sportneer

High Security & Keyless Design: Say goodbye to the hassle of carrying keys and hello to keyless convenience. The advanced 5-digit combination lock offers unparalleled protection, with up to 100,000 possible combinations, making it virtually impossible to crack. This bike chain lock is the perfect choice for those who value safety and convenience above all else.
Rock-solid & Built to Last : The Sportneer bicycle lock is as tough as nails. Crafted from ultra-thick 0.236"/6mm manganese steel, it boasts unparalleled resistance against cutting and sawing. The lock core, made from sturdy zinc alloy, adds an extra layer of protection, thwarting any attempts at malicious cutting and ensuring long-lasting durability.
Scratch-Resistant Cover & Dustproof Cap: The flexible high-quality polypropylene fabric cover protects your hands against heat or cold, and prevents chain from rust, and keeps the bike paint from scratches, ensuring the lock lasts for years to come. Plus, the dustproof cap is an added bonus, keeping rainwater and sand out of the lock hole.
Convenient & Easy to Reset: Setting up and resetting your personalized combination password is a breeze. The initial password is 00000, and when it's time to set a new password, simply keep the number wheels in the correct unlock password state and rotate the reset dial 90° to set the new password. No more worry about forgetting your password or struggling to reset it again.
Versatile Applications: With options available in lengths of 3.2ft, you can easily lock two bikes together. Better yet, this bike lock is also suitable for a wide range of applications, including bicycles, electric bikes, ladders, lawnmowers, gates, fences, toolboxes, sports equipment, and more.

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#6 Top Pick

Kryptonite Combo Bike U-Lock Standard, Anti-Theft Security Bicycle Lock, 12mm Steel Shackle, 4-Digit Resettable Combination U Lock for Scooter Road Mountain Bikes

Brand: KRYPTONITE

DURABLE DESIGN: This Anti-Theft bike u lock features a 12mm hardened steel shackle that provides high security against theft. This combo u-lock includes an easy to use 4-digit resettable combination and no keys for you to lose
MULTI-FUNCTIONAL: This Kryptonite bike lock is ideal to secure your bicycles, sports equipment, gates and fences, tool boxes & ladders, grills & lawnmowers, skateboards, truck bed and more
PORTABLE SIZE: This is a standard size bicycle u lock which is great for many lock-up scenarios. Size interior locking dimensions are 4" x 8" and exterior locking dimensions are 6.5” x 9.5”
COMBO SAFE PROGRAM: Register your unique 4-digit combination code on our website and our customer service team will be able to help, should you forget your combination
ANTI-THEFT PROTECTION OFFER (ATPO): Up to $500 reimbursement upon registration. Kryptonite stands behind its products by providing an Anti-Theft Protection Offer on specific locks. Created by Kryptonite in 1978, the Anti-Theft Protection Offer is a program that reimburses registered customers for a specific monetary amount in the event their bicycle/motorcycle is stolen due to the opening or breaking of the lock by force

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#7 Top Pick

Heavy Duty Anti Theft Bike U Lock with 120cm Security Steel Cable - 16mm Shackle Bicycle U-Locks with Keys for Road Mountain Electric & Folding Bike

Brand: Generic

Premium Heavy Duty Bike Lock This bike lock comes with a 16mm heavy duty shackle and has excellent heat resistant and hydraulic shear resistant. Equipped with a 2.6mm silicone cover, it can prevents scratch well and provides excellent safety protection for your bicycle.
Easy to Install and UseThe combination bike lock is equipped with a 10MM diameter thick steel cable with a length of 120CM and a high-quality mounting bracket, allowing you to easily install and use it without additional tools. It is very user-friendly.
Precision locking cylinders & 2 Keys The lock core is made of zinc alloy，has a precise structure to prevent technical opening. The key is made of brass，very strong and durable. In addition, the key-hole is very smooth, put the key in the top of the keyhole, can be easily opened. Comes with 2 keys to ensure you have a backup at all times.
Weatherproof & Wear Resistant Ebike locks heavy duty anti theft chain is wrapped in a durable nylon protector, bike-u -lock outer protector is silicone, weatherproof and suitable for outdoor use, which can effectively prevent your bicycle or other property from being scratched by the heavy duty anti theft u lock and strong motorcycle chain
Multi-purpose: The motorcycle locks anti theft chain is 120cm long, which is enough to lock 3 to 4 tricycles together, you can also lock motorcycle together with a thick bar, and you can use a electric bike locks in low-risk areas. The heavy duty bike chain has two different sized steel rings, the smaller ring can be threaded through the larger ring and has more locking options. It's perfect for locking electric-motorcycle, motorbikes, e-bikes, electric-scooter, moped, tricycle, bicycle, lawnmowers, gates, fences, ladders, grills, sports equipment and toolboxes. This is the perfect gift for family, friends and students.

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#8 Top Pick

FITTOO Bike U Lock with Cable, Bicycle Lock Heavy Duty, Extra Long 150CM Security Steel-Wire Cable, Widely Applicable of U Shape Lock for Bikes, Electric Bikes, Trolleys, Ladders and Doors Etc

Brand: FITTOO

【Sturdy & Multifunctional】This FITTOO bike U lock is made of Dia-28mm steel lock bar and Dia-14mm steel lock U-frame. You can’t cut it by any normal cutting tools. It is a very sturdy and durable lock, which brings more safety to your bike or your belongings. Moreover, the 150cm steel-wire cable is very useful. You can lock several bikes together, or lock your helmet and other tools to your bike, or lock your bike to a bike rail or tree trunk very easily. And the full silicon cover will keep your bikes or belongings off painting- scratched.
【Small & Strong】This FITTOO U lock is in smaller size then most other U-clocks in market. You can easily carry it in your backpack, or a small hand-bag. It saves more storage space, and it is light weight, which are more friendly to women, children and old people. It is a strong lock, but smaller size as well.
【Widely Application】With this FITTOO U-lock, you can lock several bikes together when your family go out for a sunny day riding, instead of bringing one lock for one bike each. You also can lock motorbike with your helmet or other belongings securely together. With the long cable, it is also a good tool to lock your trolley, scooter, shutter, gate, fence, ladder, lawn mower etc. Moreover, you may lock your bike front wheel and rear wheel at the same time, that is a promise to keep your quick-release front wheel safer as well.
【Easy Installation】This U lock is supplied with one holding-bracket, and two thickness rubber pads. You can fix the bracket on the handle bar, seat post, seat clamp, frame seat-tube by using one pad or two pads together. Then you can carry the U lock on anywhere convenient when you are riding.
【Warm Tip】 After receiving the lock, you can carry one key with you, and keep another one in a safe place as backup. Do NOT leave your beloved bikes in a remote place for long time, as NO bike lock is 100% secured.

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#9 Top Pick

Kryptonite Evolution Mini-7 Bike U-Lock with Cable, Heavy Duty Anti-Theft Bicycle U Lock, 13mm Shackle and 10mm x4ft Length Security Cable with Mounting Bracket and Keys

Brand: KRYPTONITE

DURABLE DESIGN: This Anti-Theft bike lock features a 13mm hardened max-performance steel shackle with a bent foot anti-rotation design that resists bolt cutters and twisting leverage attacks. The lock disc-style cylinder side keyway is protected by a sliding dust cover and is pick and drill resistant
MULTI-FUNCTIONAL: This Kryptonite bike lock is ideal to secure your bicycles, sports equipment, gates and fences, tool boxes & ladders, grills & lawnmowers, skateboards, truck bed and more. Includes a 4ft 10mm Steel Looped Cable For Additional Security
SPECIFICATIONS: U-Lock interior locking dimensions are 3.25 in. x 7 in, 13mm steel shackle with a weight of 3.55 lbs. Bike lock security cable is 4 ft. (1.2 m) long and 10 mm wide in diameter. Includes three stainless steel keys with an ergonomic design
EASY TRANSFORT with FLEXFRAME-U BRACKET: Includes a versatile FlexFrame U-bracket for quick and secure mounting to your bike frame, ensuring convenient transport without the need for a bag or backpack
OPTIONAL ANTI-THEFT PROTECTION: Eligible for Kryptonite’s Anti-Theft Protection Offer (ATPO) up to $2,500 coverage for registered locks

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#10 Top Pick

Sportneer Bike Lock: Heavy Duty Anti Theft Bike U Lock with 150cm Security Steel Cable - 17mm Shackle Bicycle U-Locks with Keys for Road Mountain Electric & Folding Bike (Black)

Brand: Sportneer

Portable & Rugged: The Sportneer bike u lock is both portable and heavy-duty. It measures 7.76x5.02inches, with a thickness of 0.67inches/17mm, and weights 1.64lbs. Plus, its unique polygonal lock body design and silicone coating resist water, dust, and dirt, keeping your bike scratch-free and in tip-top shape.
Easy to Install & Use: Equipped with a 5ft steel cable and a bracket, the bike lock can secure wheels, frames, or other bikes to posts, fences, or poles. Better yet, the bracket fits bike tubes with a diameter under 26mm/1.02inch-38mm/1.5inch, allowing you to lick your bike with ease.
Boosted Security & Anti-Theft: Thanks to the zinc alloy lock core and alloy steel lock head, this bike U-lock can withstand hydraulic shear forces up to 12 tons. It‘s tough as nails, resisting cutting, sawing, smashing, and drilling to protect your bike from potential theft.
Added Convenience and Peace-of-Mind: No more stress of being locked out if you lose your primary key. For extra peace of mind, we’ve included two bike lock keys so that you can carry one and keep the spare at home or in the office, ensuring you won‘t be stranded without access to your bike.
Wide Applications: Use the bike locks alone or paired with the steel cable--you make the choice! It‘s perfect for securing bicycles, children’s bikes, electric bikes, ladders, barbecue grills, sports equipment, lawnmowers, gates, and more. Make sure to check the size to ensure a perfect fit.

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10 Best Bike U Locks

Via Velo Bike U-Lock with Cable, Heavy Duty Anti-Theft Bicycle U Locks with 8mm Braided Steel and 3 Keys, 4ft Length Security Cable for Bike, Scooter Mountain Road Bike

Kryptonite New York Standard Bike U-Lock, Heavy Duty Anti-Theft, 16mm Shackle with Mounting Bracket and Keys, Ultimate Security for Bicycles E-Bikes Scooters

Sportneer Bike Lock Set Heavy Duty Keyless U Lock with 5 Ft Security Steel Cable for Road Bike Mountain Bike

Kryptonite New York Fahgettaboutit Mini Bike U-Lock, Heavy Duty Anti-Theft Bicycle U Lock, 18mm Shackle with Keys, Ultimate Security Lock for Bicycles E-Bikes Scooters

Bicycle Chain Lock, Sportneer High Security 5-Digit Resettable Combination Anti-Theft Bike Locks, Portable Outdoors Road Bike Chain Lock for Mountain Bicycles

Kryptonite Combo Bike U-Lock Standard, Anti-Theft Security Bicycle Lock, 12mm Steel Shackle, 4-Digit Resettable Combination U Lock for Scooter Road Mountain Bikes

Heavy Duty Anti Theft Bike U Lock with 120cm Security Steel Cable - 16mm Shackle Bicycle U-Locks with Keys for Road Mountain Electric & Folding Bike

FITTOO Bike U Lock with Cable, Bicycle Lock Heavy Duty, Extra Long 150CM Security Steel-Wire Cable, Widely Applicable of U Shape Lock for Bikes, Electric Bikes, Trolleys, Ladders and Doors Etc

Kryptonite Evolution Mini-7 Bike U-Lock with Cable, Heavy Duty Anti-Theft Bicycle U Lock, 13mm Shackle and 10mm x4ft Length Security Cable with Mounting Bracket and Keys

Sportneer Bike Lock: Heavy Duty Anti Theft Bike U Lock with 150cm Security Steel Cable - 17mm Shackle Bicycle U-Locks with Keys for Road Mountain Electric & Folding Bike (Black)

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